staging-v22.2.18: release-22.2: batcheval: add BarrierRequest.WithLeaseAppliedIndex
#118632
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Otherwise, `BatchRequest.RequiresConsensus()` may return `false` and not submit the barrier through Raft. Similarly, `shouldWaitOnLatchesWithoutAcquiring` will return `false` so it will contend with later writes. Barriers are not used in recent releases, so this does not have any mixed-version concerns. Epic: none Release note: None
This can be used to detect whether a replica has applied the barrier command yet. Epic: none Release note: None
This only executes random `Barrier` requests, but does not verify that the barrier guarantees are actually satisfied (i.e. that all past and concurrent writes are applied before it returns). At least we get some execution coverage, and verify that it does not have negative interactions with other operations. Epic: none Release note: None
This allows a caller to wait for a replica to reach a certain lease applied index. Similar functionality elsewhere is not migrated yet, out of caution. Epic: none Release note: None
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Backport 4/4 commits from #118474 on behalf of @erikgrinaker.
/cc @cockroachdb/release
The behavior of
Barrierdiffers between 22.2 and 23.1: the latter does not conflict with ongoing read requests, most likely because they drop latches before evaluation in 23.1. It does not seem particularly problematic that 22.2 has to wait for reads to complete, at least not for our purposes here, so I've just documented this and disabled the test coverage for read conflicts.There were also significant kvnemesis changes in 23.1, so the kvnemesis testing needed some adjustments.
Backport:
BarrierRequestasisAlone" (kvpb: markBarrierRequestasisAlone#117787)BarrierRequest.WithLeaseAppliedIndex" (batcheval: addBarrierRequest.WithLeaseAppliedIndex#117967)Replica.WaitForLeaseAppliedIndex()" (kvserver: addReplica.WaitForLeaseAppliedIndex()#117968)Please see individual PRs for details.
Release justification: prerequisites for backporting #117612.
/cc @cockroachdb/release
Release justification: